diff --git a/youtube_dl/extractor/twitch.py b/youtube_dl/extractor/twitch.py
index 247fc2f64..36aa1ad6e 100644
--- a/youtube_dl/extractor/twitch.py
+++ b/youtube_dl/extractor/twitch.py
@@ -90,7 +90,7 @@ class TwitchIE(InfoExtractor):
                 formats.append(fmt)
             self._sort_formats(formats)
             entry = dict(info)
-            entry['id'] = '%s_%d' % (entry['id'], num),
+            entry['id'] = '%s_%d' % (entry['id'], num)
             entry['title'] = '%s part %d' % (entry['title'], num)
             entry['formats'] = formats
             entries.append(entry)